AR-15 lower reciever

Disclaimer: This is a part, not a gun or other weapon, and therefore incapable of doing anything or being used by itself. As with any tool or part all weapons are only as dangerous as those wielding them.

With that out of the way, this is a remix for small printers. The original can only be found here to my knowledge: https://www.tinkercad.com/things/5S8HDOE0gYp
I suggest these other parts as well: https://www.thingiverse.com/thing:650880
https://www.thingiverse.com/thing:2499366
I have added the above mentioned parts, if you want to save time downloading files. I have printed the first version, but I do not know if it is strong enough for actual use. You may be able to use lost PLA or similar method to make it in metal.

Update: added an improved split in a less critical section with a large surface area for maximum glue strength. The update is 150mm at the longest point, check your build area before downloading. I can customize the text on the sides or remove it if you wish.